Safety device for circular saws



H. T. HEATH AND L. W. HALL.

SAF ETY DEVICE FOR ClRCULAR SAWS.

V APPLICATION FILED OCT. 28. 1916. 1,329,708. Patented Feb. 3,1920.

2 SHEElS-SHEET I.

WHa/ZZ.

H. T. HEATH AND L. W. HALL.

SAFETY DEVICE FOR CIRCULAR SAWS.

APPLICATION FILED OCT. 23, I9I6.

Patented Feb. 3, 1920.

2 SHEEI SSHEEI 2 .HIRAM 'r. AND LEON HALIQQF corroonnnEwnArrPsHni'E.

fsnFE'rY DEVICE non CIRCULAR ms.

To all whom it may concern lit known t we, llinair T..HEATH and linen W. HALL, citizens oi the United States, at Concord, in the countyv of lllerrinlacl and State of New Hampshire, have invented certain new and useful ln1- ncrements in Safety Devices for Circular Saws; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art towhich it ap- Pt to m ke and use the same. 1 ention relatesto improvements in 1- ices for circular saws.

The object ot the present invention is to improve the construction of safety devices for various t pes oil. circular saws and to provide a simple, practical and eilicient saw guard oi strong and durable and inexpen sire cmistruction adapted to be readily installed in position and capable of? protecting the eyes and the hands and of preventing the operator "from accidentally coming in contact with the saw whereby injuries resulting from such contact will be positively eliminated.

A further object of the invention is to provide a ety device of this character capable of \"r cal adjustment to arrange it in proper position with relation to the saw and also to carry it out or? the way when hoary stock is to be milled.

snother object of the invention is to provide a saw mill guard equipped with yieldable means for engaging the material to prevent the stock from jumping or binding.

lVith these and other objects in. View, the invention consists in the construction and novel combination of parts hereinafter fully described, illustrated in the accompanying drawing, and pointed out in the claim hereto appended; it being understood that various changes in the form, proportion, size and minor details or" construction, within the scope of the claim. may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawings Figure 1 is an end elevation of a safety device constructed in accordance with this invention and shown applied to a circular saw,

Fig. 2 is a side elevation of the same partly in section,

Fig. 8 is a vertical sectional view taken substantially on the line 3-3 of Fig. 2,

journal'ed in suitable bearings of a table 5 or Specification of Letters Patent; I Patented Feb.- 3, 19 20. Application filed October 28, 1916; SerialNb. 128,224} v A i Fig. 5 is adetail perspective view ofthe resilient stock engaging'member'.

Like numerals of reference designate corresponding parts in the several-figures of the drawings. p Inthe accompanying"drawings in which is illustrated the preferred embodiment of theinvention, ldesignates a sawguard de signed to be constructed of woodyor any other suitable material and constituting a sheath for the upper portionof the circular saw .2 :and provided with a segmental recess extending upwardly from thelower edge of the guard 1 and of sufiicient depth and width to receive ofyvariou s" sizes and thicknesses. I

It has been found advantageous to construct theguard 1 of oak and the recess may be readily cut in the guard whichextends in advance and in rear of the saw 2 as clearly illustrated in Fig. 2 of the drawings. The saw is mounted on an arbor 4 which is other suitable support such as a frame of a sawing machine.

The guard 1 is secured to the lower end of a pair of vertically disposed slidably mounted bars 6 preferably having their lower ends fastened in recesses 701 the guard and extending through vertical openings 8 of a supporting bar or member The supporting bar or member 9 is secured by bolts 10 to any overhead supporting means such as a beam or the like and where it is not convenient to utilize such a support ing element, a supporting frame may be provided for this purpose. The horizontal supporting and guiding member 9 of the safety device is provided with a central opening through which extends a screw 12 provided with coarse screw threads for engaging a nut 13 which is rigidly connected with the bar or member 9 preferably fixed by being let into the same as clearly illustrated in Fig. 2 of the drawings. The vertical adjusting screw 12 which is equipped at a convenient point intermediate of its ends with a hand wheel 14, at its lower end 15 is provided with a head arranged at the lower face of the plate 16 secured to the upper edge of the guard 1. The plate 16 is provided with an opening 17 through which the screw extends and said screw is swiveled to the guard 1 and is adapted to be rotated independently thereof to raise and lower the guard. In practice,the threads of the adjusting screw 12 will be such that a few turns of the screw will enable the guard to be readily carried into and out of position; The bar 6 guides the guard in its vertical movement and the said guard when applied' to saws for cutting heavy material such. logs may be made of greater size and strength to adapt it to the character of use to which it is put.

The safety device is equipped with a resilient work engaging member 18 constructed of suitable metal and provided with a longitudinal slot 19 extending inwardly from one end of the member 18 and terminating short of the other end of the same. The resilient member or spring which is curved longitudinally is provided at its ends withlips or flanges 20 which fit against the side faces of the guard. The slot 19 receives the upper portion of the saw 2and the resilient work holding member or spring is adapted to engagethe work and prevent the same from jumping up or binding against the saw; The work engaging member which is bowed downwardly presents a lower conveX face to the work and it is secured by suitable fastening devices 21 tothe guard.

The fastening devices 21 pierce the spring or member 18 and rigidly secure one end of the said spring or member to the guard.

hat is claimed is:-

A safety device for circular saws including a support, a guard adjustably connected to said support and receiving a portion of the saw, and resilient work holder secured to the lower edge of the guard and having a slot extending inwardly from one end and terminating short of the other end to receive the saw, said holder being curved downwardly from each end toward a point intermediate its ends to dispose itself in a plane on the that is considerably below that of the lower edge of said guard.

Tntestiinony whereof we afliz; our signatures. in presence of two witnesses.

HIRAM T. HEATH- LEON w. HALL- WVitnesses BENNETT BATCHELDER, CHAS. B. MAWN. 

